Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\HttpCache\AbstractSurrogate' not found in /home/edmedu/www/edmclass.com.bak/edmclass-admin/vendor/symfony/http-kernel/HttpCache/Ssi.php:22 Stack trace: #0 {main} thrown in /home/edmedu/www/edmclass.com.bak/edmclass-admin/vendor/symfony/http-kernel/HttpCache/Ssi.php on line 22